CN104641190B

CN104641190B - Freezer

Info

Publication number: CN104641190B
Application number: CN201380048835.8A
Authority: CN
Inventors: 堀尾好正
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2012-09-19
Filing date: 2013-09-19
Publication date: 2016-12-14
Anticipated expiration: 2033-09-19
Also published as: EP2899481A4; CN104641190A; JP6089222B2; WO2014045576A1; JP2014059115A; EP2899481A1

Abstract

Freezer includes: divided the refrigerating chamber formed by thermal wall；It is arranged in the cold room of the top of refrigerating chamber；Cooling chamber with the back side being arranged at refrigerating chamber.Additionally, also have: be arranged in cooling chamber, in the vertical direction stacking there is the cooler (107) of refrigerant pipe (145) of fin (146)；Be arranged in cooler (107) side, make the cold air that returns from cold room return to the cold room return duct of cooling chamber.And, the bottom of the width dimensions of the refrigerant pipe (145) of cooler (107) is shorter than the top of the width dimensions of refrigerant pipe (145), it is possible to realize wind path crushing and reduce the raising of the cooling effectiveness brought, and the part dispersion of the attachment frost of cooler (107) can be made.

Description

Freezer

Technical field

The present invention relates to the use of fan to make the circulating cold air generated by cooler thus carry out the freezer cooled down.

Background technology

In recent years, the energy-saving development of freezer, it is not only to carry out to reduce the consumption amount of power of freezer The efficiency of cooling effectiveness improves, and when door trip etc. is actually used, also is able to when cooler is attached with frost suppress cold But the decline of efficiency is critically important.

Wherein, in order to reduce the consumption amount of power of freezer, the cooling caused by the frost being attached to cooler as suppression The method that efficiency declines, in existing freezer, proposes following structure: such as, makes in the cold room storehouse high from humidity When cold air returns to cooler, cold air passes through from below by configuring the ground guided plate of cooler bottom, it is possible to realize cold But the homogenization of the frosting of device, rejection ability are deteriorated (referring for example to patent documentation 1).Further it is proposed that make from returning in storehouse Go back to the cold air inside by the heat insulation partition wall of cooler bottom, from the downside of cooler with the width of cooler substantially Pass through in the range of identical distance, be derived from the structure of the effect of the frosting homogenization of cooler (referring for example to patent literary composition Offer 2).Further, it is proposed that the cold air being provided for making to return to cooler in storehouse passes through cooler central authorities as much as possible Circulation flow path, shield, the structure (referring for example to patent documentation 3) of guide member.According to this structure, return cold air diffusion, reach The frosting homogenization of cooler, and the blocking of the cooler caused by the biasing frosting of frost can be suppressed, it is possible to suppression The decline of cooling effectiveness.

Hereinafter, with reference to the accompanying drawings of above-mentioned existing freezer.

Fig. 7 is the structure around the cooler of the freezer representing that patent documentation 1 records, particularly show cold room return cold The axonometric chart of the guided plate 28 of gas 27.Cold air after being generated by cooler 7 and circulating in storehouse, flows in storehouse as returning cold air Enter to cooler 7.Cold room from cold room returns cold air 27 and flows into the return duct 29 of the right flank side shown in Fig. 7. And, the guided plate 28 between Defrost heater 32 and drain pan 34 extends to cooler 7 from the outlet of return duct 29 The left surface side of bottom, between this guided plate 28 and drain pan 34, be formed with the space of pipeline (duct) shape.Further, exist The surface configuration of this guided plate 28 has peristome 28a, and cold room returns cold air 27 and is distributed to cooler 7 from peristome 28a Portion.Then, return cold air 30 mix with the refrigerating chamber from refrigerating chamber that is flowed between the lower end of guided plate 28 and cooler 7 Close, be equally sucked into the bottom of cooler 7.So, as the prolongation of return duct 29, Defrost heater 32 and row Guided plate 28 is set between water pond 34, makes to return cold with from refrigerating chamber of cold air 27 from the cold room of the high cold room of humidity Freeze room return cold air 30 to mix, thus enable that frost is attached to cooler 7 equably.Therefore, it is possible to prevent from being caused by frosting The biasing of the blocking between the fin of cooler 7, maintains cooling performance for a long time, and can shorten the defrosting of Defrost heater 32 Time, consume amount of power it is possible to reduce.Additionally, guided plate 28 is arranged at the above-below direction of cooler 7, will not so having The size causing the depth direction in the storehouse of freezer reduces, the effect of the internal volume minimizing etc. being not result in storehouse.

Fig. 8 A, Fig. 8 B are to represent the front cross-sectional view around the cooler of the freezer described in patent documentation 2 and cold The side cross-sectional views of the flowing of the cold air during operating of room, Tibetan.It is provided with cooler 7, in freezing at the back side of refrigerating chamber (not shown) The upper strata of room is provided with cold room, and the lower floor at refrigerating chamber is provided with vegetable compartment.The cold air cooling down cold room and circulate in storehouse, It is delivered to vegetable compartment via the return duct 29 (cold room-vegetable compartment connecting pipe) from cold room.Vegetables from vegetable compartment Dish room returns cold air, is flowed into cooling chamber 23 via the vegetable compartment return duct 31 being arranged in heat insulation partition wall 13.That is, it is not The return cold air of the cold room that will be located in the upper strata of refrigerating chamber is fed directly in cooling chamber, but makes it once be flowed into vegetable Room, the form returning cold air with vegetable compartment is flowed into cooling chamber 23.And, vegetable compartment return cold air, from be set to with cooling The vegetable compartment that the roughly equal width of the width of device 7 flows into returns outlet and is flowed into cooling chamber 23.

Thereby, it is possible to while obtaining the minimizing of effectively internal volume in suppression storehouse, make the frosting homogenization to cooler 7 Effect, so having the heat exchanger effectiveness improving cooler 7, the effect that energy saving is excellent.

Fig. 9 is the cross section structure figure in the cooling chamber of the freezer that patent documentation 3 is recorded.

Cooler 7 is arranged in the back side of refrigerating chamber 14, is configured with cold room on the top of refrigerating chamber 14.Cooling cold room it After cold room return cold air be directed to cooling chamber 23 by the return duct of cooler sidepiece.Herein, before cooler 7 Circulation flow path 47 is set between the cooler cover 20 of surface and separate freezing room 14 and cooling chamber 23, thus makes the cold room that humidity is high Return cold air spreads, and makes to be attached to the frost of cooler 7 uniformly.

According to this structure, the frost being attached to cooler 7 is disperseed, it is possible to reduce the cooling caused by the blocking of frosting The cooling effectiveness of device 7 declines, and can make to be attached to the height step-down of the frost layer of cooler 7, so also being able to improve defrosting Time efficiency.

But, in existing freezer illustrated in fig. 7, although can be by making to be attached to the attachment of the frost of cooler 7 State is uniform, and cooling effectiveness during suppression frosting declines, have can be energy-conservation effect, but owing to adding guided plate 28 Cause cost increase, and cause storehouse inner capacities to reduce.And, the guided plate 28 near cooler 7 becomes the state of extremely low temperature, The pipe interior being made up of guided plate 28 easily remains frost.Accordingly, it is considered to the freezer of substantially about 10 years during arriving use Life-time service time situation, exist owing to residual frost causes wind path to hinder and the problem that makes cooling performance decline.Additionally, draw Guide plate 28 is arranged near the lower surface of Defrost heater 32, so the heat that the Defrost heater 32 when defrosting sends can be subject to Temperature impact.The heat sent due to the Defrost heater 32 during defrosting, the surface of Defrost heater 32 rises to the most Celsius About 300 DEG C.As a result, the surface of the guided plate 28 being arranged at the vicinity of Defrost heater 32 also rises to more than 100 DEG C Celsius, So in order to prevent thermal deformation, it is necessary to there are the parts covering surface etc. with metals such as aluminium foils, there is the one-tenth causing fee of material, man-hour The problem of this rising.

Additionally, in the existing freezer that Fig. 8 illustrates, make the cold air that returns of return cooler 7 pass through cooler 7 times The inside of the heat insulation partition wall 13 in portion and return, it is possible to from the downside of cooler 7 with the width of cooler 7 substantially Identical width makes cold air pass through.Therefore, there is the heat exchanger effectiveness that can play cooler 7 to greatest extent, thus energy-conservation Property excellent, and the frost effect to the attachment homogenization of cooler 7 can be made.But, the cooling of vegetable compartment uses and utilizes cooling The wind path structure that return cold air after cold room is carried out, is easily subject to the impact of the temperature change of cold room, at outside air temperature Height, during summer of the normally opened pass of door of cold room, vegetable compartment temperature also uprises, the problem that there is freshness variation.Additionally, use to Cooler 7 return the wind path structure by the inside of heat insulation partition wall 13, for composition wind path heat insulation partition wall 13 Thickness increase, there is the problem that storehouse inner capacities reduces, component costs rises.

Additionally, in existing freezer illustrated in fig. 9, flow to the return cold air of cooler 7 by circulation from cold room Road 47 is directed to cooler middle body, thus makes the attachment state being attached to the frost of cooler 7 uniform, during suppression frosting Cooling effectiveness declines.But, owing to constituting circulation flow path etc., become Dead space many, there is the problem causing storehouse inner capacities to reduce.This Outward, there is thermal deformation, and material in the shield contacted with cooler 7 when defrosting due to the radiant heat from Defrost heater Linear expansion coefficient different, thus there is the problem producing abnormal sound between cooler 7.

Based on above-mentioned situation, the present invention provides frosting homogenization to bring cooling effectiveness during attachment frost to improve and defrosting efficiency Improve, thus the freezer that energy-efficient performance is high, and suppression Dead space and inexpensive jumbo freezer are provided.

Look-ahead technique document

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 11-183011 publication

Patent documentation 2: Japanese Unexamined Patent Publication 2011-38714 publication

Patent documentation 3: Japanese Unexamined Patent Publication 7-270028 publication

Summary of the invention

The freezer of the present invention includes: divided the refrigerating chamber formed by thermal wall；It is arranged in the cold preservation of the top of refrigerating chamber Room；It is arranged at the cooling chamber at the back side of refrigerating chamber；Be arranged in cooling chamber, in the vertical direction stacking there is the system of fin The cooler of refrigerant tube.Additionally, have the cooler cover of the front surface covering cooler；With the side being arranged in cooler , make to return to the cold room return duct of cooling chamber from the cold air of cold room.And, the broad-ruler of the refrigerant pipe of cooler Very little bottom is shorter than the top of the width dimensions of refrigerant pipe.

By using such structure, the freezer of the present invention can make the space enlargement of the returning part of cold air in storehouse, Realize the minimizing of wind path crushing, improve cooling effectiveness, and the part dispersion of attachment frost can be made.Therefore, under conditions of high humidity Easily in the case of frosting, it is also possible to the degradation that suppression frost causes, and it is capable of defrosting efficiency by frost dispersion Improve, it is possible to provide the freezer that energy saving is high, ensure that storehouse inner capacities.

Accompanying drawing explanation

Fig. 1 is the axonometric chart of the freezer of the 1st embodiment of the present invention.

Fig. 2 is the longitudinal section of the freezer of the 1st embodiment of the present invention.

Fig. 3 is the amplification sectional view of the cooler periphery of the freezer of the 1st embodiment of the present invention.

Fig. 4 is the front view of the cooler periphery of the freezer of the 1st embodiment of the present invention.

Fig. 5 A is the front view of the cooler of the freezer of the 1st embodiment of the present invention.

Fig. 5 B is the side view of the cooler of the freezer of the 1st embodiment of the present invention.

Fig. 6 is the axonometric chart of the cooler of the freezer of the 1st embodiment representing the present invention.

Fig. 7 is to represent the major part axonometric chart around the cooler of existing freezer.

Fig. 8 A is to represent the front cross-sectional view around the cooler of existing freezer.

Fig. 8 B is to represent the side cross-sectional views around the cooler of existing freezer.

Fig. 9 is the sectional view in the cooling chamber representing existing freezer.

Detailed description of the invention

Hereinafter, referring to the drawings embodiments of the present invention are illustrated.Wherein, to structure same as the prior art and nothing The part of difference, detailed.It addition, the invention is not restricted to this embodiment.

(the 1st embodiment)

Accompanying drawing used below describes the 1st embodiment of the present invention in detail.

Fig. 1 is the axonometric chart of the freezer of the 1st embodiment of the present invention, and Fig. 2 is the cold of the 1st embodiment of the present invention The longitudinal section of Zang Ku.Additionally, Fig. 3 is the amplification sectional view of the cooler periphery of the freezer of the 1st embodiment of the present invention, Fig. 4 is the front cross-sectional view of the cooler periphery of the freezer of the 1st embodiment of the present invention.Additionally, Fig. 5 A is the present invention The front view of the cooler of the freezer of the 1st embodiment, Fig. 5 B is the cooler of the freezer of the 1st embodiment of the present invention Side view, Fig. 6 is the axonometric chart of the cooler of the freezer of the 1st embodiment representing the present invention.

As shown in Fig. 1～Fig. 6, freezer main body 101 is the metal system (such as iron plate) with front openings Outer container 124, the interior case 125 of hard resin system (such as ABS) and hard foam filled between outer container 124 and interior case 125 The insulated body of polyurethane foam 126.The top of this freezer main body 101 is provided with cold room 102, cold room 102 it It is arranged with upper strata refrigerating chamber 103 and the ice-making compartment 104 being arranged side by side with upper strata refrigerating chamber 103.Additionally, it is upper be arranged side by side It is provided with lower floor cold between layer refrigerating chamber 103 and ice-making compartment 104 and the vegetable compartment 106 of the bottom that is arranged at freezer main body 101 Freeze room 105.Upper strata refrigerating chamber 103, ice-making compartment 104, lower floor's refrigerating chamber 105, the front surface part of vegetable compartment 106, by drawer type Not shown door 103a, 104a, 105a, 106a can be opened and closed to close.And, the front surface of cold room 102 is by the door of opposite opened 102a can be opened and closed to close.

Temperature in cold room 102 with the temperature do not freezed to carry out stored refrigerated as lower limit, be typically set at 1～ 5℃.Temperature in vegetable compartment 106 is the most identical with the temperature in cold room 102, or uses slightly higher temperature to set 2 DEG C～7 ℃.The freshness of leafy vegetable then can be maintained for a long time if low temperature.

Temperature in upper strata refrigerating chamber 103 and the temperature in lower floor's refrigerating chamber 105 are normally set up to carry out freezen protective For-22 DEG C～-18 DEG C, but in order to improve freezen protective state, the most also may be set to the low temperature of-30 DEG C～-25 DEG C.

Cold room 102, the storehouse temperature of vegetable compartment 106 are set as temperature above freezing, so being referred to as refrigerated storage temperature territory.This Outward, upper strata refrigerating chamber 103, lower floor's refrigerating chamber 105, the storehouse temperature of ice-making compartment 104 are set as zubzero temperature, so being referred to as cold Freeze temperature field.Additionally, upper strata refrigerating chamber 103 can also be as switching chamber, being arranged through use baffle mechanism etc. can be from cold Hide the room that temperature field carries out selecting to cryogenic temperature territory.

The top part of freezer main body 101 arranges depression stepwise to the direction, the back side of freezer and forms Machine Room 119, it is made up of the first top part 108 and the second top part 109.It is configured with compressor 117 in this Machine Room 119, carries out moisture The exsiccator (not shown) of removing, condenser (not shown).And, by compressor 117, exsiccator, condenser, heat transmission dissipate Heat pipe (not shown), capillary tube 118, cooler 107 loop connecting successively, enclose cold-producing medium and constitute kind of refrigeration cycle.As system Cryogen uses combustible refrigerant in recent years in order to protect environment.Additionally, using three-way valve, the kind of refrigeration cycle of switching valve In the case of, it is also possible to those functional parts are configured in Machine Room.

Additionally, cold room 102 is demarcated by the first heat insulation separating part 110 with ice-making compartment 104 and upper strata refrigerating chamber 103.This Outward, ice-making compartment 104 is demarcated by the second heat insulation separating part 111 with upper strata refrigerating chamber 103.Additionally, ice-making compartment 104 and upper strata are freezing Room 103 is demarcated by the 3rd heat insulation separating part 112 with lower floor refrigerating chamber 105.

Second heat insulation separating part 111 and the 3rd heat insulation separating part 112 be freezer main body 101 foaming after assemble portion Part, so using expanded polystyrene (EPS) usually used as heat-barrier material, but in order to improve heat-proof quality and rigidity, it is possible to use hard Matter polyurethane foam.The vacuum heat insulation material of high thermal insulation and then can also be inserted, it is achieved the further slimming of partitioning construction.

Additionally, it is heat insulation by carrying out the second heat insulation separating part 111 and the 3rd on the basis of guaranteeing the work portion of door frame The slimming of the shape of separating part 112, abandon, it can be ensured that cooling air duct and be capable of the raising of cooling capacity.Additionally, By digging out wind path in the inside of the second heat insulation separating part 111 and the 3rd heat insulation separating part 112, it is possible to reduce material and bring into This decline.

Additionally, lower floor's refrigerating chamber 105 is demarcated by the 4th heat insulation separating part 113 with vegetable compartment 106.

Then, the structure around the cooler in present embodiment is described.

Cooling chamber 123 is set at the back side of freezer main body 101, arranges as representational parts in cooling chamber 123 There is the cooler 107 generating cold air of fin tube type.Cooler 107 is including the as heat insulation partition wall second heat insulation separating part 111 and the 3rd back side of lower floor's refrigerating chamber 105 of rear area of heat insulation separating part 112, the most lengthways configure. Front surface in cooling chamber 123 is configured with the cooler cover 120 covering cooler 107, and this cooler cover 120 is provided with and makes cooling Cold air after lower floor's refrigerating chamber 105 returns to the cold air return port 135 of cooling chamber 123.Additionally, the material of cooler 107 uses aluminum Or copper.

Cooler cover 120 is made up of the front side cover 137 of lower floor's refrigerating chamber 105 side and the rear side cover 138 of cooler 107 side, It is configured with metal heat transfer promoting member 140 in cooler 107 side of rear side cover 138.The heat transfer promotion division of present embodiment Part 140 is in view of cost, in order to promote to use the aluminium foil of thickness t=8 μm for conducting heat when defrosting.Heat transfer promoting member 140 Size up and down be the size from the lower end of cooler 107 to upper end, side-to-side dimensions be between the fin of cooler 107 + The large-size of 15mm degree.By heat transfer promoting member 140 is fitted in rear side cover 138, it is possible to promote heat transfer during defrosting, Improve defrosting efficiency, obtain the shortening effect of defrosting time.It addition, in order to improve effect further, it is also possible at cooler 107 The interior case 125 of rear side configure aluminium foil.And then, if by the aluminium sheet bigger than aluminum foil thickness, the material higher than aluminothermy conductivity (such as copper) is constituted, then can play the effect that heat transfer promotes further.

Near cooler 107, (such as upper space) is configured with cold air Air Blast fan 116, this cold air Air Blast fan 116 by forced convertion mode to cold room 102, ice-making compartment 104, upper strata refrigerating chamber 103, lower floor's refrigerating chamber 105, vegetable compartment Each storeroom of 106 blows the cold air generated by cooler 107.And, in the lower section of cooler 107, as cold to being attached to But the Defrost heater that device 107, the frost of cold air Air Blast fan 116 carry out defrosting is provided with the Glass tube heater that glass tubing is made 132.The heater housing 133 of cover glass pipe heater 132 it is configured with above Glass tube heater 132.Heater housing 133 It is set as the size equal or bigger than diameter glass tube and width with diameter glass tube and width, thus, by making when defrosting The water droplet dripped from cooler 107 directly falls in the glass tubing surface of the Glass tube heater 132 of high temperature so that will not produce different Chang Yin.

Being configured with drain pan 134 in the lower section of Glass tube heater 132, this drain pan 134 is attached to cooling for acceptance The defrosting water that the frost of device 107 thaws and falls, is formed with the upper surface of the 4th heat insulation separating part 113 as refrigerating chamber lower surface It is integrated.

Herein, at the drain pan 134 that the upper surface with the 4th heat insulation separating part 113 forms as one, in refrigerating chamber following table The jut 136 that the oriented inside-of-refrigerator of mask is prominent, hooking is fixed on the bottom of cooler cover 120.Jut 136 is arranged in cold air Between lower end and the Glass tube heater 132 of return port 135, it is possible to prevent from red-hot distributing in storehouse, and in storehouse When side is seen, jut 136 is hidden in the cold air return port lower end of cooler cover 120, so attractive in appearance, exterior quality improves.

Herein, as the cold-producing medium of kind of refrigeration cycle in recent years, from the viewpoint of earth environmental protection, use and become as the whole world The iso-butane of the combustible refrigerant that warm potentiality is little.This as the iso-butane of hydro carbons compared with air, under room temperature atmospheric pressure, than It is heavily about (2.04,300K in) 2 times of air.Thus, compared with prior art, it is possible to reduce refrigerant charge, it is achieved Low cost, and just in case making leakage rate less when combustible refrigerant leaks, it is possible to increase safety.

In the present embodiment, using iso-butane as cold-producing medium, as explosion-proof countermeasure, glass tubing when limiting defrosting adds The outline of the hot device 132 i.e. maximum temperature on glass tubing surface.Therefore, in order to reduce the glass tubing table of Glass tube heater 132 The temperature in face, uses 2 layers of Glass tube heater that glass tubing is formed as 2 layers.Additionally, as the temperature reducing glass tubing surface Scheme, it is possible at the glass tubing surface winding high parts (such as aluminum fin-stock) of thermal diffusivity.Now, by making glass tubing be 1 layer, The overall dimensions that can make Glass tube heater 132 is less.

As the mechanism of the efficiency improved when defrosting, in addition to Glass tube heater 132, it is also possible to used along and cold But the tube heater that device 107 is close to.Now, the direct heat transfer from tube heater is utilized to carry out cooler 107 efficiently Defrosting, and Glass tube heater 132 can be utilized to make to be attached to the drain pan 134 of the surrounding of cooler 107, cold air air-supply wind The frost of fan 116 melts.Therefore, it is possible to reduce defrosting time, energy-conservation, the rising of the storehouse temperature suppressed in defrosting time.

It addition, in the case of being applied in combination Glass tube heater 132 and tube heater, by making respective heater Capacity is appropriate, it is possible to reduce the capacity of Glass tube heater 132.When heater capacity step-down, it is also possible to reduce when defrosting The temperature of the outline of Glass tube heater 132, thus also be able to suppression defrosting time red-hot.

Then, the cooling of freezer is described.Owing to such as from intrusion heat and the door trip etc. of extraneous air, lower floor is cold The storehouse temperature freezing room 105 rises, and when refrigerating chamber sensor (not shown) is more than start-up temperature, compressor 117 starts, and starts Cooling.From the cold-producing medium of the High Temperature High Pressure that compressor 117 is discharged, (do not scheme eventually arriving at the exsiccator being arranged in Machine Room 119 Show) period, particularly in the radiating tube (not shown) being arranged at outer container 124, due to the air in the outside of outer container 124, The heat exchange of the hard polyurethane foams 126 in storehouse, is cooled and liquefies.

Then the cold-producing medium after liquefaction is reduced pressure by capillary tube 118, is flowed into cooler 107, with the storehouse of cooler 107 periphery Interior cold air carries out heat exchange.Cold air after heat exchange utilize near cold air Air Blast fan 116 blow in storehouse and in cold room. Afterwards, cold-producing medium is heated gasification and returns to compressor 117.Being cooled in storehouse, the temperature of refrigerating chamber sensor (not shown) becomes When stopping below temperature, the operating of compressor 117 stops.

Cold air Air Blast fan 116 can directly be configured at interior case 125, it is also possible to second assembled after being configured at foaming is heat insulation Separating part 111, realizes the minimizing of manufacturing cost by carrying out the assembly processing of parts.Additionally, before cold air Air Blast fan 116 Being configured with the bubbler (not shown) formed by front side cover 137, the wind that the static pressure of the most self cooling gas Air Blast fan 116 is high does not directly have Damage lost territory to blow out in storehouse.

For the freezer of said structure, below its action, effect are illustrated.

As in this embodiment, vegetable compartment 106 is arranged below, arranges lower floor's refrigerating chamber 105, cold room in centre The layout structure of 102 freezers being disposed over from ease of use and energy-conservation from the viewpoint of be often used.Additionally, from storehouse From the viewpoint of inner capacities, the tendency increased with the usage amount of frozen food, also sell the storehouse inner box making lower floor's refrigerating chamber 105 Body size improves more greatly the freezer of capacity.

As wind path structure now, first, cooler 107 cold air generated utilizes the cold air near cooler to blow Fan 116 is blown to cold room 102, upper strata refrigerating chamber 103, lower floor's refrigerating chamber 105.Blow to upper strata via cooler cover 120 Refrigerating chamber 103, the circulating cold air of lower floor's refrigerating chamber 105, return to cooling from the cooling return port 135 of the bottom of cooler cover 120 Room 123.On the other hand, to the cold air of cold room 102 air-supply, it is controlled while opening and closing baffle plate (not shown) so that become For the temperature with storehouse temperature equal extent.After baffle plate, cold air is blown to cold room 102, after being circulated, via Cooling chamber 123 is returned to by the cold room return duct 129 of cooler side.

Additionally, vegetable compartment 106 makes air-supply shunt, via by cooler 107 to a part for the cold air of cold room 102 The vegetable compartment discharge line (not shown) of side is flowed into vegetable compartment 106.Then, this cold air cools down circulation in vegetable compartment 106 After, return to cooling chamber 123.It addition, about the cooling of vegetable compartment 106, in the present embodiment, make to be sent to the cold of cold room 102 A part for gas shunts and is used for the cooling of vegetable compartment 106 but it also may use the baffle plate of vegetable compartment cooling independently to carry out cold But.

In general, cooling chamber is positioned at the back side of refrigerating chamber, when making the cold air of the cold room from top return to cooling chamber, Need pipeline.Pipeline is Dead space, so for the minimizing suppressing internal volume, typically at cooling chamber side configuring pipes.But It is that now, the cold room that humidity is high returns the inflow of cold air 127 to be carried out from the side of cooler 107, so being difficult to frosting Homogenization, exist deflection cooler 107 frosting problem.

Wherein, the cooler 107 of present embodiment with the cooler 107 generally used again it is representational finned tube The cooler 107 of formula, at the cooler 107 being laminated with the refrigerant pipe 145 with fin 146 in the vertical direction.Cooler In 107, by being configured with 10 layers of refrigerant pipe 145 the most in the vertical direction, being configured with 3 row refrigerant pipes in the longitudinal direction 145 and 30 refrigerant pipes 145 being formed are configured at cooler 107.The refrigerant pipe 145 of the cooler 107 of present embodiment Width dimensions to be configured to bottom shorter than top.Herein, the width dimensions of refrigerant pipe 145 refers to, in terms of freezer front surface The size of left and right directions of cold-producing medium 145, i.e. the length of refrigerant pipe 145.

Thus, as a rule, be attached to the frost of cooler 107 many can be attached to flow into cooler 107 from storehouse Return the inflow entrance of cold air.The cold room particularly flowed into by cold room return duct 129 at the cold room 102 high from humidity The part returning cold air 127 inflow easily adheres to frost.The width dimensions making refrigerant pipe 145 in present embodiment is formed as bottom Shorter than top, the wind path that it is possible to suppress the attachment of frost and growth to cause hinders.Thus, due to high temperature and humidity such as summers Under the conditions of door opening and closing etc. and causing invade under conditions of the moisture in storehouse causes overload, be also not easy to occur by the growth of frost Blunt cold (slow cooling, cooling capacity declines) when causing wind path to hinder, has the effect of the quality improving product.

Additionally, make from cold room return duct 129 to the broad-ruler of the refrigerant pipe 145 of the inflow part of cooler 107 Very little shorter, it is possible to reach the minimizing of the wind path crushing (flowing resistance) brought by the space enlargement of inflow part.Thus, pass through The flowing resistance making return cold air reduces, by increasing capacitance it is possible to increase air circulation, increases the heat exchange amount of cooler 107, makes evaporating temperature Rise, improve the raising of running efficiency of kind of refrigeration cycle, it is possible to realize energy-conservation.And, cold room return cold air 127 to The inflow part of cooler 107 does not has refrigerant pipe 145, matches with the increase of air circulation, and cold room returns cold air 127 energy Enough expanded scope ground carries out heat exchange with cooler 107.In general, the ability of cooler: Q is represented by Q=K*A* Δ T.This Place, K: hot percent of pass, A: heat transfer area, Δ T: cooler with by the temperature difference of air.Therefore, in freezer with cooler The bigger cold room of temperature difference return cold air 127 and can improve the heat exchanger effectiveness of cooler 107, it is possible to realize energy-conservation.And And, heat exchange area expands, and also makes dehumidification area i.e. in the enlarged areas of cooler 107 frosting, it is possible to suppression frosting Time cooling capacity be deteriorated.Thereby, it is possible to make operating freezer until the time that must carry out defrosting is elongated, it is possible to reduce glass The input number of times of glass pipe heater 132, reduces the input required for cooling in the storehouse after the storehouse temperature that caused by defrosting rises Electric power, it is possible to more energy-conservation.

Further, the input number of times of the Glass tube heater 132 during minimizing defrosting and input time, non-cooled is also brought along The suppression that the temperature that the temperature that limited operational times brings rises suppression, the heating of Glass tube heater self causes rises, right The food preserved in storehouse also brings impact.The frozen food preserved in storehouse, owing to non-cooled during defrosting causes the duration of runs Temperature rises, the inflow etc. in storehouse of the heat radiation of the temperature of Glass tube heater self and heating installation during defrosting, due to frostbite, heat The impact of change and can degenerate.But, in the present embodiment, it also is able to suppress food to degenerate when long-time preservation.

Additionally, when making freezer carry out cooling operating, process over time, due in the air of intrusion during door opening and closing Moisture, put on the food in storehouse the moisture of attachment and from the moisture etc. of the vegetable being stored in vegetable compartment 106, at cooler 107 attachment frosts.When this frost is grown into, the heat exchanger effectiveness between cooler 107 and circulation cold air declines, it is impossible to enough make storehouse In sufficiently cool, eventually become blunt cold, not cold state.Thus, periodically the frost being attached to cooler 107 is carried out in freezer Defrosting is necessary.

In the freezer of present embodiment, make freezer operate, automatically defrost after certain time.In defrosting Time, stop compressor 117, the operating of cold air Air Blast fan 116, the Glass tube heater 132 as Defrost heater is energized. Cooler 107 utilizes the cold-producing medium of the inside being stranded in cooler 107, is attached to white the melting of cooler 107, substantially warp Changed by the sensible heats of-30 DEG C～0 DEG C, the latent heat of 0 DEG C change, sensible heat change from 0 DEG C and gradually heat up.Herein, cooler 107 are provided with defrosting sensor (not shown), when becoming the temperature of regulation, stop the energising of Glass tube heater 132.In this reality Execute in mode, detect that the moment of 10 DEG C stops the energising of Glass tube heater 132 at defrosting sensor.

Now, due to the energising of Glass tube heater 132, glass tubing surface becomes high temperature, due to radiant heat, is attached to cold But drain pan 134, the frost of cold air Air Blast fan 116 around device 107, cooler 107 melt, and thus recover cooler 107.

It addition, such as in the low external air temperature environment that external air temperature is about 5 DEG C or lower temperature, even if The frost of cooler 107 is fully removed, due to extraneous air impact defrosting time defrosting sensor (not shown) temperature also It is difficult to fully heat up, there is the tendency that defrosting time is elongated.Now, it is possible to observe more than 0 DEG C sensible heat change state, in conjunction with The control of defrosting is terminated time more than certain time.Thereby, it is possible to suppress following situation: even if the most fully defrosting, but due to Low external air temperature causes cooler 107 to heat up deficiency and makes defrosting time elongated, carries out unwanted heater input, Radiant heat in storehouse is caused intensification, and cooling during defrosting stops causing heating up.

In the cooler 107 of present embodiment, in the period at the interval of defrosting cycle, cool down energy due to the impact of frosting Power is gradually reduced.Then, make easily to adhere to frost, from cold room return duct 129 to the cold air inflow part of cooler 107, The fin 146 on the top of the refrigerant pipe 145 that i.e. width dimensions shortens is arranged to sparse.According to this structure, can not only subtract Return the flowing resistance of cold air less and increase air circulation, and the wind path blocking that frost when can reduce frosting causes, suppression Performance degradation during attachment frost, raising frosting tolerance performance.

Further, sparse by making fin 146 be arranged on the direct of travel of cold air, ventilation resistance can not only be reduced Power and increase air circulation, it may have performance when wind path blocking that frost when reducing further frosting causes, suppression attachment frost The effect of deterioration.

It addition, the fin 146 of the cooler 107 of present embodiment is for the refrigerant pipe 145 of stacking in the vertical direction Use the fin of segmentation, but fin number becomes many, so needing the work of multiple installation fin in the manufacturing process of cooler 107 Time.Accordingly it is also possible to use the fin of one in the vertical direction.Thereby, it is possible to minimizing is attached to the individual of the fin of cooler Number, improves and cost reduces it is possible to band cause reduces the productivity brought man-hour.

It addition, the cold-producing medium 145 of the cooler 107 of present embodiment be referred to as the pipe of naked pipe in pipe in unprocessed system Refrigerant tube 145.Therefore, in order to improve the pyroconductivity in pipe, such as, grooved pipe can also be used.Grooved pipe has by directly The grooved pipe that groove, helicla flute are constituted, is improved by the performance using grooved pipe to be capable of cooler, the most energy-conservation.

It addition, the refrigerant pipe 145 of the cooler 107 of present embodiment uses aluminium material.High from fee of material in recent years From the viewpoint of the minimizing cost rising required, use aluminum but it also may use copper more.Now, pyroconductivity is improved, institute Improve with the heat exchanger effectiveness inside and outside refrigerant pipe 145, the most energy-conservation.

Additionally, be arranged in the cold room return duct 129 of side of cooler 107 to the opening of cooler 107, cold preservation Return duct peristome upper end, room 143 is arranged in the position by the top, cooler lower end 144 than cooler 107.Thus, cold preservation The peristome of room return duct 129 expands, it is possible to reduce the wind path crushing to cooler 107 further, it is possible to realize by The increase of air circulation bring based on the raising of the cooling performance of cold room 102, and heat exchanger effectiveness improves the joint brought The raising of energy property.Additionally, than cooler lower end 144 by the top position configuration cold room return duct peristome upper end 143, Thus easily cold room is returned cold air 127 to guide to cooler 107.Further, it is possible to by one of the side of cooler 107 It is allocated as using for wind path, it is possible to reduce Dead space, it is ensured that storehouse inner capacities.

Additionally, cooler cover 120 has refrigerating chamber cold air return port 135, refrigerating chamber cold air return port upper end 139 in bottom It is arranged in ratio position by the top, cooler lower end 144, it is possible to make in storehouse the return cold air of circulation relative to cooling The heat exchange area of device 107 becomes big.Therefore, it is possible to increase the heat exchange amount of cooler 107, improve the ability of cooler 107.

Additionally, by improving the heat exchange amount of cooler 107 and increasing air circulation, it is possible to reduce in cold room time Between, so while the shortening cooling down the duration of runs can make to reduce to the frosting degree of cooler.Thereby, it is possible to extend cooler Defrosting cycle, it is achieved cold in the minimizing of the input number of times of Glass tube heater 132, and the storehouse after causing storehouse temperature to rise of defrosting The minimizing of required input electric power, the most energy-conservation.

Additionally, due to wind path improves so that the heat exchange area of cooler 107 becomes big, and this also makes to tie at cooler 107 The area of frost becomes big, it is possible to cooling capacity during suppression frosting is deteriorated.Thereby, it is possible to make to operate freezer until necessary The time carrying out defrosting is elongated, it is possible to reduce the input number of times of Glass tube heater 132, reduces the storehouse temperature caused by defrosting Input electric power required for cooling down in storehouse after rising, it is possible to more energy-conservation.

It addition, be provided with wind direction guide portion 122 at cold air return port 135.The interval of this wind direction guide portion 122 is 5mm, examines Consider to preventing finger from invading and guaranteeing mould and the intensity of cooler cover 120.It addition, wind direction guide portion 122 is also in storehouse Cross-flow quench device side is installed at an upward angle.

It addition, the inclination of wind direction guide portion 122 is upward direction, it is possible to reduce the suction wind path of return cold air Flowing resistance, and it is capable of the homogenization of air-flow, the raising of cooling effectiveness, the most energy-conservation.

Additionally, Glass tube heater 132 is centrally located at ratio the at the bottom of composition refrigerating chamber the 4th of basic side the in present embodiment The position that heat insulation separating part 113 is top.Thereby, it is possible to make with refrigerating chamber at the bottom of basic side one drain pan 134 shape substantially Level, it is possible to reduce the Dead space for arranging Glass tube heater 132, it is possible to increase internal volume.Furthermore it is possible to make The degree of depth of drain pan 134 is shallower, it is possible to make the die cost during parts that shaping constitutes less, so cost reduces.

It addition, in the present embodiment, the 4th heat insulation separating part 113 of refrigerating chamber basic side is constituted as other parts Constitute.Only form the 4th heat insulation separating part 113 as sub-operation, take insertion in subsequent handling to be assembled in interior case thus realize The sharing of operation sequence, the method improving production efficiency.Outside this structure, it is also possible to by the 4th heat insulation separating part 113 by Interior case is constituted.Now, utilize forming machine to extend the ABS sheet of the material as interior case 125, formed and include interior case 125 and separate The one-body molded body in portion.The program is applicable to the structure that the depth (degree of depth) of interior case 125 is less, but owing to sheet material calendering can be real Existing the most thickness uniformizing, thus can also use in the making of the deeper freezer of depth.Thus, the material of separating part is made Expense, working hour, administration fee, fare etc. can reduce, and cost is greatly decreased, and also is able to improve production efficiency, institute It also is able to reduce with the cost of product.

As discussed above, the freezer of the present invention includes: divided the refrigerating chamber formed by thermal wall；It is arranged in The cold room of the top of refrigerating chamber；It is arranged at the cooling chamber at the back side of refrigerating chamber；In cooling chamber, at above-below direction with being arranged in Upper stacking has the cooler of the refrigerant pipe of fin.Additionally, have the cooler cover of the front surface covering cooler；With Be arranged in cooler side, the cold room return duct that makes to return to cooling chamber from the cold air of cold room.And, cooler The bottom of width dimensions of refrigerant pipe shorter than the top of the width dimensions of refrigerant pipe.

Thus, when flowing into cooler from the return cold air in storehouse, the space enlargement of inflow part, so wind path crushing (flowing resistance) reduces.Thus, the flowing resistance returning cold air declines, thus air circulation also increases, the heat exchange of cooler Amount increases, and evaporating temperature rises, and the running efficiency of kind of refrigeration cycle improves, it is possible to realize energy-conservation.

Additionally, the increase of air circulation makes it possible to improve the heat exchange amount of cooler, reduce the time in cold room, institute The minimizing of the frosting degree to cooler is brought with the shortening of cooling duration of runs.Thereby, it is possible to extend the defrosting cycle of cooler, Reduce input number of times to Defrost heater, cool down in reducing the storehouse after the storehouse temperature that defrosting causes rises required for input Electric power, the most energy-conservation.

Additionally, generally, remove the frost in cooler be more attached to flow into cooler from the return cold air in storehouse Inflow entrance.To this, the width dimensions making the refrigerant pipe of the bottom of cooler in the present invention is shorter, thus such as high in humidity And under the conditions of the summer that door opening and closing is often easily in the case of refrigerant pipe, fin attachment frost, it is also possible to become be difficult to by Frost causes the state of blocking.I.e., it is possible to make the part dispersion of attachment frost, adhere to frost equably at cooler.

Additionally, in the present invention, it is also possible to the part that the width dimensions of refrigerant pipe is shorter, is that cold air is from cold room recurrent canal The part that road flows into cooler.

In cooler, start most to carry out heat exchange with the refrigerant pipe of the entrance being configured at the inflow part returning cold air And dehumidify, thus adhere to frost, but the cold room flowed into by cold room return duct from the cold room that humidity is high returns cold air institute The part flowed into easily adheres to frost.In the present invention, by making cold room return the refrigerant pipe of the part that cold air is flowed into relatively Short, it is possible to the wind path that the attachment of suppression frost and growth cause hinders.Thus, even if due under the high temperature super-humid conditions such as summer Under conditions of causing overload in door trip etc. cause moisture to invade storehouse, also will not hinder due to the wind path that the growth of frost causes And become blunt cold state.

Additionally, make shorter to the refrigerant pipe of the inflow part of cooler from the return duct of cold room, so inflow part Space enlargement, wind path crushing (flowing resistance) reduce.Thus, it also is able to increase by the flowing resistance of minimizing return cold air follow Ring air quantity, increases the heat exchange amount of cooler, makes evaporating temperature increase, raising refrigeration cycle efficiency, it is possible to realize energy-conservation.

Further, return cold air at cold room and there is no refrigerant pipe to the inflow part of cooler, with the increasing of air circulation Adding and match, cold room returns cold air can carry out heat exchange with cooler in expanded scope ground.Thus, cold room return cold air exists In freezer relatively big with the temperature difference of cooler, it is possible to improve the heat exchanger effectiveness of cooler, it is achieved energy-conservation.And, heat Exchange area expands, and also makes dehumidification area i.e. in the enlarged areas of cooler frosting, it is possible to cooling during suppression frosting Less able.Thereby, it is possible to make operating freezer until the time that must carry out defrosting is elongated, it is possible to reduce Defrost heater Input number of times, cool down required input electric power in reducing the storehouse after the storehouse temperature that caused by defrosting rises, it is possible to more Energy-conservation.

Additionally, the present invention can also the fin of refrigerant pipe on top of the shorter part of the width dimensions of refrigerant pipe join Put sparse.

Cooler will have the refrigerant pipe stacking in the vertical direction of fin, so producing at the upstream side returning cold air During the wind path blocking caused by frost, downstream side portion is divided into the state not carrying out heat exchange, produces the loss of cooling effectiveness.Right This, by the present invention in that fin is arranged to sparse, and the flowing resistance of return cold air can not only be made to decline, increase circulated air Amount, and the wind path blocking that frost when can reduce frosting causes, degradation during suppression attachment frost, it is possible to increase cooler Frosting tolerance performance.

Additionally, the present invention can also the upper end of peristome of cold room return duct, be arranged in and lean on than the lower end of cooler The position of top.

Thus, the peristome of cold room return duct expands, and reduces further to the wind path crushing of cooler, it is possible to realize The raising of the cooling performance based on cold room brought by air circulation increase, and heat exchanger effectiveness improve bring energy-conservation Property improve.Additionally, by making the upper end of the peristome of cold room return duct be arranged in the position by the top, lower end than cooler Put, not only easily will return cold air and guide to cooler, and a part for cooler side can be used as wind path, and therefore can Enough reduce Dead space, it is ensured that storehouse inner capacities.

The cold air from refrigerating chamber is made to return to cooling chamber additionally, the present invention can also be provided with in the bottom of cooler cover Refrigerating chamber cold air return port, the upper end of refrigerating chamber cold air return port is arranged in the position by the top, lower end than cooler.

Thereby, it is possible to make return cold air bigger to the heat exchange area of cooler.And, return the logical of cold air by reducing Wind resistance also is able to increase air circulation, increases the heat exchange amount of cooler, improves evaporating temperature, improves refrigeration cycle efficiency, It is possible to energy-conservation.

Additionally, by improving the heat exchange amount of cooler and increasing air circulation, it is possible to reduce the time in cold room.Cause This, can make to reduce to the frosting degree of cooler owing to cooling down the shortening of the duration of runs.Thereby, it is possible to extend the defrosting of cooler Cycle, it is achieved in the minimizing of the input number of times of Defrost heater, and the storehouse after causing storehouse temperature to rise of defrosting needed for cooling The minimizing of input electric power, the most energy-conservation.

Additionally, due to wind path improves so that the heat exchange area of cooler becomes big, and this also makes the face in cooler frosting Long-pending change is big, it is possible to cooling capacity during suppression frosting is deteriorated.Thereby, it is possible to make to operate freezer until must remove The time of frost is elongated, it is possible to reduce the input number of times of Defrost heater, reduces the storehouse after the storehouse temperature caused by defrosting rises Input electric power required for interior cooling, it is possible to more energy-conservation.

Additionally, in the present invention, it is also possible to cold air from cold room return duct to the system of the left and right of the direct of travel of cooler The fin of refrigerant tube is arranged to sparse.

Sparse by making fin be arranged on the direct of travel of cold air, it is possible to reduce the ventilation returning cold air further Resistance, increase air circulation.And, the return cold air high especially for the humidity of cold room, vegetable compartment can reduce frosting Time frost cause wind path blocking, further suppression attachment frost time performance degradation, it is possible to improve frosting tolerance further Performance.In order to improve frosting tolerance performance, need on cooler, adhere to frost equably.Assume the cold air that time per unit circulates Water quantities contained by is identical, then due to the uniform frosting of cooler, it is possible to postpone the wind path obstruction that frosting causes.And, The thickness of frost is roughly the same, so the defrosting efficiency making frost melt during defrosting improves, defrosting time shortens.

Additionally, in the present invention, defrosting Glass tube heater, Glass tube heater can be provided with in the lower section of cooler Centre-height be positioned at the position by the top, basic bottom surface than refrigerating chamber.

Thereby, it is possible to make the drain pan being integrated with the basic side at the bottom of refrigerating chamber be shaped as approximate horizontal, it is possible to reduce For arranging the Dead space of Defrost heater, it is possible to increase internal volume.Furthermore it is possible to make the degree of depth of drain pan shallower, It is possible to make the die cost during parts that shaping constitutes less.

Probability is utilized in industry

As it has been described above, the cold room of the present invention can be applied to improve energy saving, freeze preservation performance, expand storehouse content Home-use freezer etc. for the purpose of amount.

Reference numeral explanation

7 coolers

13 heat insulation partition walls

14 refrigerating chambers

20 cooler covers

23 cooling chambers

27,127 cold rooms return cold air

28 guided plates

28a peristome

29 return ducts

30 refrigerating chambers return cold air

31 vegetable compartment return ducts

32 Defrost heaters

34,134 drain pan

47 circulation flow paths

101 freezer main bodys

102 cold rooms

102a, 103a, 104a, 105a, 106a door

103 upper strata refrigerating chambers

104 ice-making compartments

105 lower floor's refrigerating chambers

106 vegetable compartment

107 coolers

120 cooler covers

123 cooling chambers

124 outer containers

Case in 125

126 hard polyurethane foams

129 cold room return ducts

132 Glass tube heaters

135 cold air return ports

139 refrigerating chamber cold air return port upper ends

143 cold room return duct peristome upper ends

144 cooler lower ends

145 refrigerant pipes

146 fins

Claims

1. a freezer, it is characterised in that including:

The refrigerating chamber formed is divided by thermal wall；

It is arranged in the cold room of the top of described refrigerating chamber；

It is arranged at the cooling chamber at the back side of described refrigerating chamber；

Be arranged in described cooling chamber, in the vertical direction stacking there is the cooler of refrigerant pipe of fin；

Cover the cooler cover of the front surface of described cooler；With

Be arranged in described cooler side, make from the cold air of described cold room return to described cooling chamber cold room return Pipeline, wherein,

The bottom of the width dimensions of the described refrigerant pipe of described cooler is shorter than the top of the width dimensions of described refrigerant pipe,

The part that the width dimensions of described refrigerant pipe is shorter, be cold air via described cold room return duct from described cooler The inflow part that flows into described cooler of side, the most described space flowing into part is extended.

2. freezer as claimed in claim 1, it is characterised in that:

The fin of the described refrigerant pipe on the top of the part that the width dimensions of described refrigerant pipe is shorter is arranged to sparse.

3. freezer as claimed in claim 1 or 2, it is characterised in that:

The upper end of the peristome of described cold room return duct, is arranged in the position by the top, lower end than described cooler.

4. freezer as claimed in claim 1 or 2, it is characterised in that:

The refrigerating chamber making to return to described cooling chamber from the cold air of described refrigerating chamber it is provided with cold in the bottom of described cooler cover Gas return port, the upper end of described refrigerating chamber cold air return port is arranged in the position by the top, lower end than described cooler.

5. freezer as claimed in claim 1 or 2, it is characterised in that:

Cold air from described cold room return duct to the fin of the described refrigerant pipe of the left and right of the direct of travel of described cooler It is arranged to sparse.

6. freezer as claimed in claim 1 or 2, it is characterised in that:

Be provided with defrosting Glass tube heater in the lower section of described cooler, the centre-height of described Glass tube heater is positioned at Position by the top, basic bottom surface than described refrigerating chamber.